CN108869273B - Reciprocating rotary screw pump driven by sucker rod with rod - Google Patents
Reciprocating rotary screw pump driven by sucker rod with rod Download PDFInfo
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- CN108869273B CN108869273B CN201811026989.8A CN201811026989A CN108869273B CN 108869273 B CN108869273 B CN 108869273B CN 201811026989 A CN201811026989 A CN 201811026989A CN 108869273 B CN108869273 B CN 108869273B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 3
- 230000007306 turnover Effects 0.000 claims description 3
- 238000000605 extraction Methods 0.000 abstract description 19
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000004576 sand Substances 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 43
- 230000009471 action Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
- F04C13/001—Pumps for particular liquids
- F04C13/002—Pumps for particular liquids for homogeneous viscous liquids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
- F04C13/008—Pumps for submersible use, i.e. down-hole pumping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
- F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Transmission Devices (AREA)
Abstract
The reciprocating rotary screw pump based on the drive of sucker rod with rod belongs to the field of oil field production equipment technology, and consists of screw driver comprising linear ball spline guide pair and screw ball driver pair; the ball spline linear guide rail pair is formed by connecting a spline sleeve, a ball return ball reverser, a ball screw shaft and an axial baffle plate; the ball screw transmission pair is formed by connecting a screw sleeve, a ball return ball reverser, a ball screw shaft and a circumferential baffle; the reciprocating rotary screw pump is formed by connecting a gear set, a gear box sealing end cover, a one-way valve, a male rotor, a female rotor, a screw bushing, a bearing and a bearing end cover; besides the high viscosity, high sand content, high oil gas ratio and high water content, the invention also has the characteristics of high adaptability and long service life of the oil extraction of the plunger pump with the rod, and can be used for deep well oil extraction.
Description
Technical Field
The invention belongs to the technical field of oilfield exploitation equipment, relates to a screw pump, and in particular relates to a reciprocating rotary screw pump based on sucker rod drive for oilfield exploitation.
Background
With the continuous development of each oil field development, the difficulty of the oil field development is increased, and the dynamic liquid level is greatly reduced due to the reduction of the stratum energy of the oil extraction well, so that a plurality of oil fields sequentially produce thick oil with high sand content and high oil-gas ratio. The efficiency of the plunger pump for oil extraction of the plunger pump with the rod is reduced, the efficiency is even lower than 30 percent, sand blocking and other problems often occur, the production efficiency is seriously influenced, and a plurality of oil wells are scrapped in advance. For these cases, screw pump oil recovery is the ideal mechanical recovery method. At present, the oil extraction by the rod plunger pump is the most widely used mechanical oil extraction technology at home and abroad, and the number of mechanical oil extraction wells in the world is 9 percent of the total number of production wells, and 80 to 85 percent of the mechanical oil extraction wells adopt the oil extraction mode by the rod plunger pump. Compared with a plunger pump with a rod, the screw pump has high oil extraction efficiency and strong self-absorption capacity, is also very suitable for the crude oil extraction with high viscosity, high sand content and high oil-gas ratio, has more and more remarkable effect in oilfield production, and has obvious rising trend of application quantity and level. If the existing mechanical oil extraction technology of the rod plunger pump at home and abroad is changed into the existing screw pump oil extraction technology, no matter the existing screw pump in any driving mode is adopted for extraction, the existing widely and largely used three-pump oil extraction equipment and the ground system thereof are idle or scrapped.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and provides a reciprocating rotary screw pump based on the driving of a sucker rod with a rod, which not only has the advantages of adapting the screw pump to oil exploitation with high viscosity, high sand content, high oil-gas ratio and high water content, but also has the characteristics of strong adaptability and long service life of the sucker rod plunger pump oil exploitation, and can be used for deep well oil exploitation, and the relative parts in a direct rotation mechanism are rolling friction pairs, so that the mechanical efficiency of the screw pump can be improved, the forward rotation and the reverse rotation of the screw can realize oil pumping action, and the production efficiency is greatly improved.
The technical scheme of the invention is as follows: the reciprocating rotary screw pump driven by the sucker rod comprises a sucker rod and a screw pump shell, and an oil inlet is arranged on the screw pump shell; the method is characterized in that: the reciprocating rotary screw pump consists of a screw transmission device and a reciprocating rotary screw pump;
the spiral transmission device consists of a ball spline linear guide rail pair and a ball spiral transmission pair; the ball spline linear guide rail pair is formed by connecting a spline sleeve, a ball return ball reverser, balls, a ball screw shaft and an axial baffle plate, wherein the spline sleeve is in spline connection with the ball screw shaft, the spline sleeve is in circumferential fixed connection with a screw pump shell through an inner hexagon screw, and the axial baffle plate is connected to two sides of the spline sleeve; the ball screw transmission pair is formed by connecting a screw sleeve, a ball return ball reverser, a ball screw shaft and a circumferential baffle, wherein the screw sleeve and the ball screw shaft form transmission connection, the screw sleeve is connected with a screw pump shell in a matched manner through a bearing, and the circumferential baffle is arranged on the outer side of the screw sleeve; the sucker rod is fixedly connected with the ball screw shaft through threads and cylindrical pins, and the ball screw shaft is driven by the sucker rod to do reciprocating linear motion; the external surface of the ball screw shaft is provided with a ball straight groove and a ball screw groove, the internal surfaces of the spline housing and the screw housing are provided with the same ball straight groove and ball screw groove so as to realize the internal circulation of the balls, and one end of the ball return ball reverser is provided with a ball return groove so as to realize the external circulation of the balls; the ball screw shaft reciprocates in a linear manner to drive the screw sleeve and the spline screw auxiliary shaft sleeve to rotate, and the screw transmission device is connected with the screw pump shell in a matched manner through a bearing;
the reciprocating rotary screw pump is formed by connecting a gear set, a one-way valve, a female rotor, a male rotor, a screw bushing, a bearing end cover, a gear box sealing end cover and a bearing; the gear set is arranged at the input shaft ends of the female rotor and the male rotor, the gear set is circumferentially fixed with the female rotor and the male rotor through key connection and axially fixed with the bushings through hexagonal nuts, the bearings are arranged at the shaft ends of the bushings, the bearing end covers are arranged at the shaft ends of the bearings and are fixedly connected with the screw pump shell through socket head cap screws, the gear box sealing end covers are tightly attached to the end surfaces of the bearing end covers, and oil seals in sealing connection with the female rotor and the male rotor are arranged in the gear box sealing end covers; the screw rod bush sets up the outside of female rotor and male rotor, screw rod bush and female rotor, male rotor form the screw rod cavity, screw rod bush and screw pump shell fixed connection, be equipped with the business turn over oilhole on the screw rod bush, the both sides of screw rod bush all are equipped with the check valve, the check valve comprises valve body, case and case baffle, be equipped with the sealing block between check valve and the screw pump shell, the case baffle sets up between check valve and the screw rod bush, the output of male rotor pass through spline connector with spline spiral countershaft cover is connected.
The sucker rod is of a hollow structure and is driven by a power source to do linear motion.
The head of the ball screw shaft is in a round table structure with threads.
A sealing baffle is arranged between the spline spiral auxiliary shaft sleeve and the screw pump shell, and the sealing baffle is used for sealing and preventing dust from entering.
The oil inlets are symmetrically arranged on the screw pump shell.
The screw rod bush surface is equipped with symmetrical lug, is equipped with symmetrical square hole on the screw pump shell, and screw rod bush forms fixed connection through the cooperation of lug and square hole with the screw pump shell, opens on the screw rod bush has symmetrical business turn over oilhole.
The bearings are radial thrust ball bearings used in pairs so as to realize radial positioning and axial stress balance of parts.
The beneficial effects of the invention are as follows: the invention provides a reciprocating rotary screw pump based on sucker rod drive with a rod, which structurally comprises a screw transmission device and a reciprocating rotary screw pump, wherein the screw transmission device comprises a ball spline linear guide rail pair and a ball screw transmission pair; the ball spline linear guide rail pair is formed by connecting a spline sleeve, a ball return ball reverser, balls, a ball screw shaft and an axial baffle plate, the ball screw transmission pair is formed by connecting a screw sleeve, the ball return ball reverser, the balls, the ball screw shaft and the circumferential baffle plate, and the reciprocating rotary screw pump is formed by connecting a gear set, a one-way valve, a female rotor, a male rotor, a screw bushing, a bearing end cover, a gear box sealing end cover and a bearing; by utilizing the advantages of the rod oil extraction technology and the screw pump oil extraction technology, besides the screw pump is suitable for oil exploitation with high viscosity, high sand content, high oil gas ratio and high water content, the screw pump has the characteristics of strong adaptability and long service life of the rod plunger pump oil extraction, can be used for deep well oil extraction and the like, and the rolling friction pairs are arranged between the opposite parts in the direct rotation mechanism, so that the mechanical efficiency of the screw pump can be improved, the forward rotation and the reverse rotation of the screw can realize oil pumping action, and the production efficiency is greatly improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is an enlarged schematic view of the screw transmission at a in fig. 1.
Fig. 3 is a schematic view of the oil path of the reciprocating rotary screw pump of the present invention.
Fig. 4 is a schematic view of a cross-sectional structure in the direction B-B in fig. 1.
Fig. 5 is a schematic view of a cross-sectional structure in the direction C-C in fig. 1.
In the figure: screw pump housing 1, socket head cap screw 2, hexagonal nut 3, gear set 4, bushing 5, bearing end cap 6, bearing 7, oil seal 8, gear box seal end cap 9, check valve 10, seal block 11, valve core baffle 12, screw bushing 13, female rotor 14, male rotor 15, bearing output end cap 16, spline connector 17, spline spiral sub-shaft sleeve 18, ball spiral shaft 19, ball return bead reverser 20, seal baffle 21, spiral sleeve 22, circumferential baffle 23, axial baffle 24, spline sleeve 25, screw 26, cylindrical pin 27, valve core 28, sucker rod 29.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1-5, the reciprocating rotary screw pump driven by the sucker rod comprises a sucker rod 29, a screw pump shell 1 and an oil inlet arranged on the screw pump shell 1; the reciprocating rotary screw pump consists of a screw transmission device and a reciprocating rotary screw pump;
the spiral transmission device consists of a ball spline linear guide rail pair and a ball spiral transmission pair; the ball spline linear guide rail pair is formed by connecting a spline sleeve 25, a ball return ball reverser 20, balls, a ball screw shaft 19 and an axial baffle 24, wherein the spline sleeve 25 is in spline connection with the ball screw shaft 19, the spline sleeve 25 is in circumferential fixed connection with the screw pump shell 1 through an inner hexagon screw 2, and the axial baffle 24 is connected with two sides of the spline sleeve 25; the ball screw transmission pair is formed by connecting a screw sleeve 22, a ball return ball reverser 20, a ball screw shaft 19 and a circumferential baffle plate 23, wherein the screw sleeve 22 and the ball screw shaft 19 form transmission connection, the screw sleeve 22 is in matched connection with the screw pump shell 1 through a bearing 7, and the circumferential baffle plate 24 is arranged on the outer side of the screw sleeve 22; the sucker rod 29 is fixedly connected with the ball screw shaft 19 through threads and the cylindrical pin 27, and the ball screw shaft 19 is driven by the sucker rod 29 to do reciprocating linear motion; the outer surface of the ball screw shaft 19 is provided with a ball straight groove and a ball screw groove, the inner surfaces of the spline housing 25 and the screw housing 22 are provided with the same ball straight groove and ball screw groove to realize the internal circulation of the balls, and one end of the ball return ball reverser 20 is provided with a ball return groove to realize the external circulation of the balls; the reciprocating linear motion of the ball screw shaft 19 drives the screw sleeve 22 and the spline screw auxiliary shaft sleeve 18 to rotate, and the screw transmission device is matched and connected with the screw pump shell 1 through the bearing 7;
the reciprocating rotary screw pump is formed by connecting a gear set 4, a one-way valve 10, a female rotor 14, a male rotor 15, a screw bushing 13, a bearing end cover 6, a gear box sealing end cover 9 and a bearing 7; the gear set 4 is arranged at the input shaft ends of the female rotor 14 and the male rotor 15, the gear set 4 is circumferentially fixed with the female rotor and the male rotor through key connection, and is axially fixed with the bushing 5 through the hexagonal nut 3, the bearing 7 is arranged at the shaft end of the bushing 5, the bearing end cover 6 is arranged at the shaft end of the bearing 7, the bearing end cover 6 is fixedly connected with the screw pump shell 1 through the socket head cap screw 2, the gear box sealing end cover 9 is tightly attached to the end surface of the bearing end cover 6, and an oil seal 8 which is in sealing connection with the female rotor and the male rotor is arranged in the gear box sealing end cover 9; the screw bush 13 is arranged outside the female rotor 14 and the male rotor 15, the screw bush 13, the female rotor 14 and the male rotor 15 form a screw cavity, the screw bush 13 is fixedly connected with the screw pump shell 1, oil inlet holes and oil outlet holes are formed in the screw bush 13, the check valves 10 are arranged on two sides of the screw bush 13, each check valve 10 is composed of a valve body, a valve core 28 and a valve core baffle 12, a sealing block 11 is arranged between each check valve 10 and the screw pump shell 1, the valve core baffle 12 is arranged between each check valve 10 and the screw bush 13, and the output end of the male rotor 15 is connected with a spline spiral auxiliary shaft sleeve 18 through a spline connector 17.
As shown in fig. 1-5, the sucker rod 29 is of a hollow structure and is driven by a power source to do linear motion based on a reciprocating rotary screw pump driven by a sucker rod with a rod; the head of the ball screw shaft 19 is in a round table structure with threads; a sealing baffle 21 is arranged between the spline spiral auxiliary shaft sleeve 18 and the screw pump shell 1, and the sealing baffle 21 is used for sealing to prevent dust from entering; the oil inlets are symmetrically arranged on the screw pump shell 1; the outer surface of the screw bush 13 is provided with symmetrical convex blocks, the screw pump shell 1 is provided with symmetrical square holes, the screw bush 13 and the screw pump shell 1 are fixedly connected through the cooperation of the convex blocks and the square holes, and the screw bush 13 is provided with symmetrical oil inlet and outlet holes; the bearings 7 are radial thrust ball bearings used in pairs so as to realize radial positioning and axial stress balance of parts.
As shown in fig. 1-5, the reciprocating rotary screw pump driven by the sucker rod with a rod is divided into an upper stroke and a lower stroke, and the specific process is as follows:
(1) Upstroke (upstroke)
When the sucker rod 29 moves upwards, the spline screw shaft 19 moves linearly through the conversion of the ball spline linear guide rail pair, the spline screw auxiliary shaft sleeve 18 is driven to rotate anticlockwise, the spline connector 17 drives the screw male rotor 15 to rotate anticlockwise, torque is transmitted to the screw female rotor 14 through the gear pair, the female rotor 14 rotates clockwise, a certain pressure difference is generated between an upper cavity and a lower cavity between the screw shell 1 and the screw bushing 13 due to the fact that air is extruded through meshing of the male rotor and the female rotor, at the moment, low pressure is generated in the upper cavity, high pressure is generated in the lower cavity, the valve core 1 in a low pressure state is opened, the valve core 4 is closed, oil enters from the valve core 1 through the valve core, passes through the screw cavity, enters the lower cavity through meshing extrusion of the male rotor and the female rotor, flows out of the valve core 3 of the lower cavity into a public cavity, and flows out of an oil way through a spiral transmission device part to be collected.
(2) Downstroke of
When the sucker rod 29 moves downwards, clockwise rotation of the spline spiral auxiliary shaft sleeve 18 is achieved through the ball spline linear guide rail pair and the ball spiral transmission pair, the screw male rotor 15 is driven to rotate clockwise through the spline connector 17, the female rotor 14 is driven to rotate anticlockwise through gear transmission, air is extruded through meshing of the male rotor and the female rotor, high pressure is generated in an upper cavity between a screw shell and a screw bushing, low pressure is generated in a lower cavity, the valve core 2 and the valve core 4 are opened, the valve core 1 and the valve core 3 are closed, oil enters from the valve core 2 through an oil inlet, flows through the screw cavity, enters the upper cavity through meshing extrusion of the male rotor and the female rotor, flows out of the valve core 4 into a public cavity, and flows out of a public oil way through a spiral transmission device part to be collected.
Claims (7)
1. The reciprocating rotary screw pump driven by the sucker rod comprises a sucker rod (29) and a screw pump shell (1), and an oil inlet is arranged on the screw pump shell (1); the method is characterized in that: the reciprocating rotary screw pump consists of a screw transmission device and a reciprocating rotary screw pump;
the spiral transmission device consists of a ball spline linear guide rail pair and a ball spiral transmission pair; the ball spline linear guide rail pair is formed by connecting a spline sleeve (25), a ball return ball reverser (20), balls, a ball screw shaft (19) and an axial baffle plate (24), wherein the spline sleeve (25) is in spline connection with the ball screw shaft (19), the spline sleeve (25) is in circumferential fixed connection with a screw pump shell (1) through an inner hexagon screw (2), and the axial baffle plate (24) is connected to two sides of the spline sleeve (25); the ball screw transmission pair is formed by connecting a screw sleeve (22), a ball return reverser (20), balls, a ball screw shaft (19) and a circumferential baffle plate (23), wherein the screw sleeve (22) and the ball screw shaft (19) form screw motion connection, the screw sleeve (22) is matched and connected with a screw pump shell (1) through a bearing (7), and the circumferential baffle plate (23) is arranged on the outer side of the screw sleeve (22); the sucker rod (29) is fixedly connected with the ball screw shaft (19) through threads and a cylindrical pin (27), and the ball screw shaft (19) is driven by the sucker rod (29) to do reciprocating linear motion; the outer surface of the ball screw shaft (19) is provided with a ball straight groove and a ball screw groove, the inner surfaces of the spline sleeve (25) and the screw sleeve (22) are provided with the same ball straight groove and the same ball screw groove so as to realize the internal circulation of the balls, and one end of the ball return reverser (20) is provided with a ball return groove so as to realize the external circulation of the balls; the ball screw shaft (19) moves in a reciprocating and linear mode to drive the screw sleeve (22) and the spline screw auxiliary shaft sleeve (18) to rotate, and the screw transmission device is connected with the screw pump shell (1) in a matched mode through the bearing (7);
the reciprocating rotary screw pump is formed by connecting a gear set (4), a one-way valve (10), a female rotor (14), a male rotor (15), a screw bushing (13), a bearing end cover (6), a gear box sealing end cover (9) and a bearing (7); the gear set (4) is arranged at the input shaft ends of the female rotor (14) and the male rotor (15), the gear set (4) is circumferentially fixed with the female rotor and the male rotor through key connection and axially fixed with the bushing (5) through the hexagonal nut (3), the bearing (7) is arranged at the shaft end of the bushing (5), the bearing end cover (6) is arranged at the shaft end of the bearing (7), the bearing end cover (6) is fixedly connected with the screw pump shell (1) through the socket head cap screw (2), the gear box sealing end cover (9) is tightly attached to the end face of the bearing end cover (6), and an oil seal (8) which is in sealing connection with the female rotor and the male rotor is arranged in the gear box sealing end cover (9); screw rod bush (13) set up the outside of female rotor (14) and male rotor (15), screw rod bush (13) and female rotor (14), male rotor (15) form screw rod cavity, screw rod bush (13) and screw pump shell (1) fixed connection, be equipped with the business turn over oilhole on screw rod bush (13), the both sides of screw rod bush (13) all are equipped with check valve (10), check valve (10) are by valve body, case (28) and case baffle (12) constitution, be equipped with sealing block (11) between check valve (10) and screw pump shell (1), case baffle (12) set up between check valve (10) and screw rod bush (13), the output of male rotor (15) pass through spline connector (17) with spline spiral auxiliary shaft sleeve (18) are connected.
2. The sucker rod drive based reciprocating rotary screw pump according to claim 1 wherein: the sucker rod (29) is of a hollow structure and is driven by a power source to do linear motion.
3. The sucker rod drive based reciprocating rotary screw pump according to claim 1 wherein: the head of the ball screw shaft (19) is in a round table structure with threads.
4. The sucker rod drive based reciprocating rotary screw pump according to claim 1 wherein: a sealing baffle (21) is arranged between the spline spiral auxiliary shaft sleeve (18) and the screw pump shell (1), and the sealing baffle (21) is used for sealing and preventing dust from entering.
5. The sucker rod drive based reciprocating rotary screw pump according to claim 1 wherein: the oil inlets are symmetrically arranged on the screw pump shell (1).
6. The sucker rod drive based reciprocating rotary screw pump according to claim 1 wherein: the section of the screw bush (13) is in an 8 shape, the upper surface and the lower surface of the screw bush are symmetrically provided with convex blocks, the inner surface of the screw pump shell (1) is provided with symmetrical square holes, the screw bush (13) and the screw pump shell (1) are fixedly connected through the cooperation of the convex blocks and the square holes, and symmetrical oil inlet and outlet holes are formed in the screw bush (13).
7. The sucker rod drive based reciprocating rotary screw pump according to claim 1 wherein: the bearings (7) are radial thrust ball bearings used in pairs so as to realize radial positioning and axial stress balance of parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811026989.8A CN108869273B (en) | 2018-09-04 | 2018-09-04 | Reciprocating rotary screw pump driven by sucker rod with rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811026989.8A CN108869273B (en) | 2018-09-04 | 2018-09-04 | Reciprocating rotary screw pump driven by sucker rod with rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108869273A CN108869273A (en) | 2018-11-23 |
| CN108869273B true CN108869273B (en) | 2024-02-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811026989.8A Active CN108869273B (en) | 2018-09-04 | 2018-09-04 | Reciprocating rotary screw pump driven by sucker rod with rod |
Country Status (1)
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| CN (1) | CN108869273B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869119A (en) * | 2019-04-22 | 2019-06-11 | 山东泽元石油机械有限公司 | A kind of extracting device of oil |
| CN114294219B (en) * | 2022-01-10 | 2023-04-25 | 东北石油大学 | Intermittent oil extraction screw pump ground hydraulic driving device |
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| CN108869273A (en) | 2018-11-23 |
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